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3 years ago

Please help! Math problem.2x+4=0: Solve for x

Mathematics

2 answers:

Irina-Kira [14]3 years ago

6 0

Equation: $2x+4=0$

Subtract 4 from both sides:

$2x+4-4=0-4\\2x=-4$

Divide both sides by 2:

$\frac{2x}{2}=\frac{-4}{2}$

Simplify:

$\frac{-4}{2}=-2\\x=-2$

Therefore, your answer would be x = -2.

-TestedHyperr

lutik1710 [3]3 years ago

4 0

Answer:

x = -2

Step-by-step explanation:

2x + 4 = 0

2x= -4

x=-2

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Marian is making accessories for the soccer team. She uses 888.44 inches of fabric on headbands for 36 players and 2 coaches. Sh

ki77a [65]

Answer:

23.38 inches of fabric was used for headband for each player.

9.43 inches of fabric was used for wristband for each player.

Step-by-step explanation:

Given that:

Total fabric used on headbands = 888.44 inches

Total number of players = 36

Total number of coaches = 2

Total number of people for whom headbands were made = Number of players + Number of coaches = 36 + 2 = 38

Amount of fabric used for each one = Total fabric used for headbands divided by Total number of people

Amount of fabric used for each one = $\frac{888.44}{38}=\bold{23.38\ inches}$

Similarly,

Total fabric used on wristbands = 339.48 inches

Total number of players = 36

Amount of fabric used for each one = Total fabric used for headbands divided by Total number of players

Amount of fabric used for each one = $\frac{339.48}{36}=\bold{9.43\ inches}$

8 0

3 years ago

Which equation represents grants path? A. y=2-4x B. y=4-x/2 C. y=6-x/4 D. y=8-2x

EleoNora [17]

Answer:

Step-by-step explanation:

recall that the point-slope form of a linear equation is given by

y = mx + c

Rearranging so that it is in the same form as the answer choices, we get

y = c + mx

where m is the slope and c is the y-intercept

we note the following observations

1) The line goes from top left to bottom right, this means that the slope is negative, hence m has to be negative. (in our case, all the choices have negative x)

2) The line crosses the y-axis at y = 4, this means the y-intercept is 4 and hence c = 4.

If we look at the choices, only choice B satisfies both observations (that m is negative and c = 4)

6 0

3 years ago

Read 2 more answers

Someone please helppp

mel-nik [20]

Answer:

k = 5/6

Step-by-step explanation:

First, we can make this have the form of a quadratic function, or ax²+bx+c=0. To do this, we can first subtract 10x from both sides to get

(2k+1)x²-8x=-6

Next, we can add 6 to both sides, resulting in

(2k+1)x²-8x+6 = 0

For a quadratic function of form ax²+bx+c=0, we can see that a=2k+1, b=-8, and c=6. We can then apply the quadratic equation, or

x= (-b ± √(b²-4ac))/(2a) to get our roots to be

x= (8 ± √(64-4(6)(2k+1)))/(2*(2k+1))

= (8 ± √(64-(48k+24)))/(4k+2)

= (8 ± √(40-48k))/(4k+2)

For the roots to be equal, we must have the two roots equal to each other. We can write this as

(8 + √(40-48k))/(4k+2) = (8 - √(40-48k))/(4k+2)

multiply both sides by (4k+2) to remove the denominator

8+√(40-48k) = 8 - √(40-48k)

subtract 8 from both sides to isolate the square roots

√(40-48k) = - √(40-48k)

The only number that is equal to its negative self (and is real) is 0. Therefore, √(40-48k) = - √(40-48k) = 0, so we have

√(40-48k) = 0

square both sides to remove the square root

40-48k = 0

add 48k to both sides to isolate the k and its coefficient

40 = 48k

divide both sides by 48 to isolate k

k = 40/48 = 5/6

7 0

2 years ago

Can you find the value of x please

In-s [12.5K]

Answer:

x = 5.4

Step-by-step explanation:

4/3 = 0.75

7.2*0.75 = 5.4

6 0

2 years ago

The function f(t) = 20 sin (pi over 5t) + 12 models the temperature of a periodic chemical reaction where t represents time in h

gregori [183]

The answer for the exercise shown above is the second option, which is: Maximum: 32°; minimum: −8°; period: 10 hours.
The explanation is shown below:
 You can make a graph of the function given in the problem above: f(t)=20Sin(π/5t)+12.
As you can see in the graph, the maximum point is at 32 over the y-axis, and the minimum is at -8.
The lenght of the repeating pattern of the function (Its period) is 10.

6 0

3 years ago